OLED Wallpaper: Who needs a window?
Toshiba is working on an ultra-thin OLED (Organic Light-Emitting Diode) display that could be used to wallpaper your home, turning any wall into a huge TV.
From Toshiba:

"The wallpaper uses light that has been redirected by an ultra-fine grating that is fabricated by self-assembled nano particles." Also according to Toshiba, it's several years from commercial production.

Damn — I want it now. Lenses will amplify the light, and brightness levels close to more traditional TVs will be possible with nanotechnology. Entire rooms could be covered with a floor-to-ceiling glow. Instead of picking a permanent color palette for a room, set one for your mood at the moment. Don't paint a static mural in your kid's room, just install this and keep moving murals playing all day long. Keep a sunny day in your kitchen, all winter long. Or just use it as the world's biggest badass TV. That works for me.